which is the best way to handle session state in asp.net

Nunit test cases can be written for public methods in Business layer and data layer steps to follow to write nunit test cases 1. first identify the public method in BL or DAL 2. identify the parameters that method accepts 3. create all the parameters in SETUP part 4. Create an instance of that class in TEST part 5. call that method and pass the parameters u have created in SETUP 6. check the out of that method in an assert statement 7. clean up the paramaters that u have created in SETUP